A block of 4.00 kg intially sits at rest on the conveyor belt, till the power is turned on, and the conveyor belt begins speeding up. The coeffiecients of static-kinetic friction between the block and conveyor belt are 0.500 and 0.300, respectively.
(a) Compute the magnitude of the highest acceleration which the conveyor belt can have devoid of the block slipping, rounding your answer to two significant figures.
(b) When the acceleration surpasses the highest value in part (a), so that the block begins slipping. Find out the magnitude of the block's resulting acceleration? Round your answer to two significant figures.